package com.example.springmvcdemo1.controller;

import org.springframework.web.bind.annotation.RequestMapping;
import org.springframework.web.bind.annotation.RestController;

@RestController
public class CalcController {

    @RequestMapping("/calc")
    public String calc(Integer num1, Integer num2){
        if(num1 == null || num2 == null){
            return "<h1>参数错误</h1><a href='javascript:history.go(-1);'>返回</a>";  // 注意符号 '
        }
        return "<h1>结果:"+ (num1 + num2) + "</h1>";
    }
}
